Electromagnetic device



June 12, 1928.

J. C. FIELD ELECTROMAGNETIC DEVICE Filed Nov. 14, 1921 dimi annum" lll ll Hull-ll V STATES PATENT OFFICE 1 Patented June 12,1928. i

s rosririrY o. rrELnQoEoRNGE, NEW JERSEY, AssIeNoR To WESTERN-ELECTRIC 00M- PENY, rnoonronATEn, VoFwnEw YORK. N. Y., A .CORPORATION oE'NEW YORK.

.y ELECTROMAGNETIC DEVICE. VApplication` sied November 14, 1921. serial No. 514,954.

This invention relates to electromagnetic of. insulating strips 17 and heldirmly in devices of the circuit4 controlling type. place by any suitable means, such as clamp- It is an object of the invention to provide ingvscrews 18. The pile-up comprises a pair anew and improved relay which is adapted of main springs 19 and 20 adapted to alterto Vmakev andbreak a plurality of circuits sinately engage contactsprings 21 and 22 and 60 multaneously. v. Y y 'springs'., and 24, respectively. The ymain More specifically, `the invention contemsprings 19 and120 are at all times in engage plates a relay which maybe operated by cur-v ment with the rollers 12 and13 carried by rents o1 opposite` polarity to perform afpluthe armature 7 and are flexed to normally u) rality of 'switching operations'and to this end ven'gagethe inner contact springs 22 and 23, 65 employs a vbank of springs so disposed that respectively, but are held ont of engagement alternate contacts are opened and closed, therewith and midway between their assorespectively, by Van operation of the armayciated contact springs when the laterally ture in each direction. g moving armature 7 is in the neutral position 15 Anotherfeature of the invention is a deshown inrFig. 1. Since the armature 7 is 70 vice which is quick and positive in action, normally biased, however, it will be evident and in which the contact springs may carry that each main spring contact will always y considerable current, knecessitating sulicient Abe in engagement with one or the other of pressure toinsure proper' conduction without its associatedk contact members. Thus when sparking and consequently employing relathe armature is attracted by the energiza- 75 tively strong springs and electromagnetic detion ot coil 6, main spring 19 will make with vices'having considerable power. the associated contact spring 22, and main Other features ofthe invention relate to f Spring 20 will be moved into engagement the details of construction andcombinationwith its associatedcontact spring 24. By k of parts whereby a minimum ynumber of this movement of the armature contact 21 80 parts are used, all of. which maybe easily will be opened and contact 22 closed, contact formed and assembled. i 23 opened and contact 24 closed. Whenar- Other objects and features of the invention mature 7 is moved by the energizationot will appear from a consideration or' the tolwinding 5 the positions of the contact springs lowing'description taken in conjunction with will be reversed, springs 21y and 23 being 35 the accompanying drawing and the append# closed and springs 22 and 24 being opened .ed claim. by main springs 19 and 20. Thus, although In'the drawing, Figs. land 2 are topplan as previously noted, both main springs arc andside elevation views respectively o1' a deso flexed. as to normally engage their respec- 35 vice embodying-the invention, the enclosingl tiveinner contact springs, still one main 90 cover ltherefor heilig shown in section; and Spring will always be held in engagement Fig. 3 is a detail perspective view ofthe ar-. with an outer contact against its normal tenmature employed in the device. j si'oneven when the electromagnet is deenery Referring' to the drawing, 5 and r6 desiggized. This holding means is controlled by 4o nate the windings ot an electromagnet con-v the magnetism in the permanent magnet 10 95 trolling an arn'iature 7 which is centrally pivwhich polarizes the cores oi the coils 5 and. (i. oted in an inverted U-shap'ed member 8 It is to be understood that the invention -mounted on the .bracket 9; This armature is is not limited to two main springs and their polarized by means ot' a permanent magnet .associated` contact springs, as banks of 10. Attached to the armature 7 is a bifursprings may be employed in any ydesired 100 cated arm 11 carrying studs upon which are number according to the number of circuits mounted rollers'12 and 13 of insulating maf it is desired to control. By this arrangeterial lwhich are each adapted to engage one ment of contact members adapted to be accontact springofa spring pile-up 14. The tuated by an armature, it will be seen that coils 5 and 6' and the cores on which they are' any number of electrical ycircuits may be 105 wound are supported in the bracket 9 which `made and broken alternately and simultais mounted on a base 15. The spring pilenp neously. 14 is mounted on a plate 16 fixed to the The entire electromagnetic structure may bracket 9 and comprises a pluralityof spring. be conveniently enclosed by a glass cover contact members suitably separated by means 25 which mayrest upon a felt surface 26 110 securely held in place by means ox-iY 'elu'wa- 1e'n293tlie ififclfliefsing-between ,e coils 5 :1nd 6 and li'eld by ny'suiali'le lioldingv means, not shown in' the., gliawic'ngwbefneth the base 15. tions Witliy the Coilvsunnd nliepping pille-up may be mede through a plurality of bindhgLlDOSfS'BO; 1 i 1 f .Wl1a,i;.is .claimed is; .Y l f .relwyQonipifixsingn paiiofvcoilszwound so. that the Cotes have .opposite polarity when eneitgiZecL. a inoyable 12inncuieka.,` -peiinzinenu v i 1, niagnetronewpole oi wlnen is udqacent lsind fziigingituie, the, otlienlpole of. whiclifis vCon- '.nected. to; zu. fixed armature 3011i1ng pf said. coile;A said arniture when. attrae-ted ni'kingeontaet with efeoi'e' and remaining v il 'd In .Witness whereof',V I hereuntoi subscr the .cores g te Siiied toy tend to engage the inner .springe the @mme armature heme a pair of insulating vstuds engaging said middie; springs, and Vlwhen nokednforeing one middle Spin'gut of,eontaot :with ...its inner Spf-ting and. into 'Contact v,with A its n, outer springend 'allowing ythe otlierfiniddle spring gage its innei spring;

Iille my naine tliislOthvday f November AgDf., 

